use button for submit since there is no form element

Author: rarityXtreme

debugging/book-library/index.html

@@ -35,7 +35,7 @@ <h1>Library</h1>
       <label class="form-check-label">
         <input type="checkbox" class="form-check-input" id="check" value="" />Read
       </label>
-      <input type="submit" value="Submit" class="btn btn-primary" onclick="submit();" />
+      <button type="button" class="btn btn-primary" onclick="submit()">Submit</button>
     </div>
   </div>